+++ /dev/null
-/* anet.c -- Basic TCP socket stuff made a bit less boring
- *
- * Copyright (c) 2006-2009, Salvatore Sanfilippo <antirez at gmail dot com>
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * * Redistributions of source code must retain the above copyright notice,
- * this list of conditions and the following disclaimer.
- * * Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * * Neither the name of Redis nor the names of its contributors may be used
- * to endorse or promote products derived from this software without
- * specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
- * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include "fmacros.h"
-
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include <netinet/tcp.h>
-#include <arpa/inet.h>
-#include <unistd.h>
-#include <fcntl.h>
-#include <string.h>
-#include <netdb.h>
-#include <errno.h>
-#include <stdarg.h>
-#include <stdio.h>
-
-#include "anet.h"
-
-static void anetSetError(char *err, const char *fmt, ...)
-{
- va_list ap;
-
- if (!err) return;
- va_start(ap, fmt);
- vsnprintf(err, ANET_ERR_LEN, fmt, ap);
- va_end(ap);
-}
-
-int anetNonBlock(char *err, int fd)
-{
- int flags;
-
- /* Set the socket nonblocking.
- * Note that fcntl(2) for F_GETFL and F_SETFL can't be
- * interrupted by a signal. */
- if ((flags = fcntl(fd, F_GETFL)) == -1) {
- anetSetError(err, "fcntl(F_GETFL): %s\n", strerror(errno));
- return ANET_ERR;
- }
- if (fcntl(fd, F_SETFL, flags | O_NONBLOCK) == -1) {
- anetSetError(err, "fcntl(F_SETFL,O_NONBLOCK): %s\n", strerror(errno));
- return ANET_ERR;
- }
- return ANET_OK;
-}
-
-int anetTcpNoDelay(char *err, int fd)
-{
- int yes = 1;
- if (setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &yes, sizeof(yes)) == -1)
- {
- anetSetError(err, "setsockopt TCP_NODELAY: %s\n", strerror(errno));
- return ANET_ERR;
- }
- return ANET_OK;
-}
-
-int anetSetSendBuffer(char *err, int fd, int buffsize)
-{
- if (setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &buffsize, sizeof(buffsize)) == -1)
- {
- anetSetError(err, "setsockopt SO_SNDBUF: %s\n", strerror(errno));
- return ANET_ERR;
- }
- return ANET_OK;
-}
-
-int anetTcpKeepAlive(char *err, int fd)
-{
- int yes = 1;
- if (setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, &yes, sizeof(yes)) == -1) {
- anetSetError(err, "setsockopt SO_KEEPALIVE: %s\n", strerror(errno));
- return ANET_ERR;
- }
- return ANET_OK;
-}
-
-int anetResolve(char *err, char *host, char *ipbuf)
-{
- struct sockaddr_in sa;
-
- sa.sin_family = AF_INET;
- if (inet_aton(host, &sa.sin_addr) == 0) {
- struct hostent *he;
-
- he = gethostbyname(host);
- if (he == NULL) {
- anetSetError(err, "can't resolve: %s\n", host);
- return ANET_ERR;
- }
- memcpy(&sa.sin_addr, he->h_addr, sizeof(struct in_addr));
- }
- strcpy(ipbuf,inet_ntoa(sa.sin_addr));
- return ANET_OK;
-}
-
-#define ANET_CONNECT_NONE 0
-#define ANET_CONNECT_NONBLOCK 1
-static int anetTcpGenericConnect(char *err, char *addr, int port, int flags)
-{
- int s, on = 1;
- struct sockaddr_in sa;
-
- if ((s = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
- anetSetError(err, "creating socket: %s\n", strerror(errno));
- return ANET_ERR;
- }
- /* Make sure connection-intensive things like the redis benckmark
- * will be able to close/open sockets a zillion of times */
- setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
-
- sa.sin_family = AF_INET;
- sa.sin_port = htons(port);
- if (inet_aton(addr, &sa.sin_addr) == 0) {
- struct hostent *he;
-
- he = gethostbyname(addr);
- if (he == NULL) {
- anetSetError(err, "can't resolve: %s\n", addr);
- close(s);
- return ANET_ERR;
- }
- memcpy(&sa.sin_addr, he->h_addr, sizeof(struct in_addr));
- }
- if (flags & ANET_CONNECT_NONBLOCK) {
- if (anetNonBlock(err,s) != ANET_OK)
- return ANET_ERR;
- }
- if (connect(s, (struct sockaddr*)&sa, sizeof(sa)) == -1) {
- if (errno == EINPROGRESS &&
- flags & ANET_CONNECT_NONBLOCK)
- return s;
-
- anetSetError(err, "connect: %s\n", strerror(errno));
- close(s);
- return ANET_ERR;
- }
- return s;
-}
-
-int anetTcpConnect(char *err, char *addr, int port)
-{
- return anetTcpGenericConnect(err,addr,port,ANET_CONNECT_NONE);
-}
-
-int anetTcpNonBlockConnect(char *err, char *addr, int port)
-{
- return anetTcpGenericConnect(err,addr,port,ANET_CONNECT_NONBLOCK);
-}
-
-/* Like read(2) but make sure 'count' is read before to return
- * (unless error or EOF condition is encountered) */
-int anetRead(int fd, char *buf, int count)
-{
- int nread, totlen = 0;
- while(totlen != count) {
- nread = read(fd,buf,count-totlen);
- if (nread == 0) return totlen;
- if (nread == -1) return -1;
- totlen += nread;
- buf += nread;
- }
- return totlen;
-}
-
-/* Like write(2) but make sure 'count' is read before to return
- * (unless error is encountered) */
-int anetWrite(int fd, char *buf, int count)
-{
- int nwritten, totlen = 0;
- while(totlen != count) {
- nwritten = write(fd,buf,count-totlen);
- if (nwritten == 0) return totlen;
- if (nwritten == -1) return -1;
- totlen += nwritten;
- buf += nwritten;
- }
- return totlen;
-}
-
-int anetTcpServer(char *err, int port, char *bindaddr)
-{
- int s, on = 1;
- struct sockaddr_in sa;
-
- if ((s = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
- anetSetError(err, "socket: %s\n", strerror(errno));
- return ANET_ERR;
- }
- if (setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)) == -1) {
- anetSetError(err, "setsockopt SO_REUSEADDR: %s\n", strerror(errno));
- close(s);
- return ANET_ERR;
- }
- memset(&sa,0,sizeof(sa));
- sa.sin_family = AF_INET;
- sa.sin_port = htons(port);
- sa.sin_addr.s_addr = htonl(INADDR_ANY);
- if (bindaddr) {
- if (inet_aton(bindaddr, &sa.sin_addr) == 0) {
- anetSetError(err, "Invalid bind address\n");
- close(s);
- return ANET_ERR;
- }
- }
- if (bind(s, (struct sockaddr*)&sa, sizeof(sa)) == -1) {
- anetSetError(err, "bind: %s\n", strerror(errno));
- close(s);
- return ANET_ERR;
- }
- if (listen(s, 32) == -1) {
- anetSetError(err, "listen: %s\n", strerror(errno));
- close(s);
- return ANET_ERR;
- }
- return s;
-}
-
-int anetAccept(char *err, int serversock, char *ip, int *port)
-{
- int fd;
- struct sockaddr_in sa;
- unsigned int saLen;
-
- while(1) {
- saLen = sizeof(sa);
- fd = accept(serversock, (struct sockaddr*)&sa, &saLen);
- if (fd == -1) {
- if (errno == EINTR)
- continue;
- else {
- anetSetError(err, "accept: %s\n", strerror(errno));
- return ANET_ERR;
- }
- }
- break;
- }
- if (ip) strcpy(ip,inet_ntoa(sa.sin_addr));
- if (port) *port = ntohs(sa.sin_port);
- return fd;
-}
projects / redis.git / blobdiff